Machine for reducing ores



\ (No Model.)

' I 3 Sheets- Sheet l. G. & A. RAYMOND.

MACHINE FOR REDUCING ORES, 6w. No. 293,787. 'PatentedFeb. 19, 1884.

.... -mmi 3 Sheets-Sheet 2.

(No Model.) I

G.\& A. RAYMOND. MACHINE FOR REDUGINGURES, &c. No, 293,787. Patent edvPeb. 19, 1884.

A Ami n. PETERS. mammo ram wiifliflsiom an y UN TED PATENT OFFICE.

GEORGE-RAYMOND AND ALBERTRAYMOND, or CHICAGO, ILLINOIS.

MACHINE FOR. REDUCING ORES, ac.

SPECIFICATION forming-part of Letters Patent No. 293,787, dated February 19, 1884.

' Application filed October 231982 (No model.)

To all whom it may concern:

Be it known that we, GEORGE RAYMOND and ALBERTRAYMOND,- of Chicago, in the county of Cook and State of Illinois, have invented certain Improvements in Machines for Reducing Ores, &c., of which the following is aspeci fication. This invention relates to improvements in the machine for which we filed an application for Letters Patent of the United States on the 2d day of July, 1883, No. 99,827, and to appliances particularly designed for use in connection therewith. The improvements relate more particularly to the construction of the rotary heads by means of which the fragments of material are impelled one against another, and to a pecu liar construction of devices for assorting the fine and coarse material and returning the latter to the machine for further treatment.

Referring to the accompanying drawings, Figure 1 represents a perspective view of'our improved machine, the body or casing being open to expose the revolving heads to view. Fig. 2 is a longitudinal vertical section through the center of our improved machine and its attachments; Fig. 3, a perspective view of one of the rotary heads, and Fig. 4 a rear end elevation of the same.

Referring to the drawings, A represents a rigid frame-work, which may be constructed of any suitable form; B, a hollow body or casing bolted firmly in position upon the frame, and having essentially the form of two truncated cones united at their bases. At its mid dle the body is provided with an outlet-opening, 1), at the top, and also with a second outlet, c, at the bottom, the latter being ordinarily closed by means of a removable cap or equivalent device. At each end the body is provided at the top with an inlet throat'or opening, (I, this opening being provided with a feed-hopper, as shown. In eachend of the body there is mounted a rotary head, vD, carried by the inner end of an independent shaft, E, which is extended outward through the end of the body and sustained in boxes or bearings upon the main frame. The two shafts, which are entirely independent of each other, are movable endwise to a limited extent in theirbearings, for a purpose hereinafter described, and are each adjusted by, means of V a hand-screw, F, seated in a stationary box or bearing,'and acting upon the outer end of the shaft, either directly or through the medium of an intervening washer, as represented in the drawings. The screws F may be seated in the outer ends of the box which sustains the shaft, orthey may be mounted in other stationary supports of any suitable form. Each of the rotary heads D consists of a hub or central portion, 0, and of a series of arms,

f, extending from said hub toward the middle of the body in a spiral or curved form, the outer edges ofthe arms following approximately the inner conical surface of the body.

It will be observed that the extremitiesof the arms are entirely free and disconnected from each other, and that they overhang a large central space or opening in the interior of the v body, as in our-previous machine. In their general construction and mode of operation theheads are very similar to those described in the original application; but they differ from them in the essential particular that the arms, instead of being projected from the side face of the hub, are extended in the present instance past or around the periphery of the hub to its outer or rear end, thus permitting the material which is'delivered through the openings (1, opposite the periphery of the hub, to pass at once in front of the arms or blades, so as to be acted upon by their faces. This improved construction enables the arms to commence their action upon the ore in a 8 5 smooth and quiet manner, and to impart thereto a motion which, although commencing easily and at a comparatively low rate of speed, is rapidly accelerated until the material is finally delivered in a horizontal direction from the extremities of the arms at avery high velocity.

Air-inlets are provided at the ends of the body, as in the original machine; but, instead of locating these openings below the shaft, we now enlarge the openings in the ends of the body around the shaft and hubs e in such man nor as to afford annular air-inlets, as shown at k. These annular inlets encircling the shaft are advantageous, in that they permit the air I00 7 to pass inward equally to all parts of the body, and in that the air is permitted to act more directly and advantageously upon the material. By adjusting the shafts endwise the distance between the inner ends of the opposing arms and the space between the outer edges of the arms and inner surfaces of the body may be varied as circumstances may require. The adj ustment of the heads in the line of their axes has the effect also of changing the area of the air-inlets, and thus controlling or changing the quantity of air admitted. Owing to the construc tion of the rotary heads in the form described and shown, they are adapted, in conjunction with the casing, to produce a strong current or blast of air inward through the openings, through the interior of the casing, and thence outward through the delivery-opening Z). For the purpose of effecting the separation of the material, we extend the dischargetube Z) upward within the lowerend ofa receiving-chan1- ber, G, the upper and lower ends of which are preferably made of conical form. \Vithin this body, immediately above the mouth of the discharge-tube I), we mount upon a sustainingrod or otherwise a conical or other suitable deflector, I-I, against which the outgoing current of air and the materials carried thereby impinge. The air and lighter matters, although deflected in a lateral direction, will continue their upward course and escape through the top of the chamber G; but the heavier particles, which need further reduction, having their momentum checked by eontact with the deflector II, will fall outward and downward around the outside of the tube Z), which is encircled by a hopper, m, designed to receive and retain the material. This hopper m communicates through weighted valves n with dischargespouts 0, leading into the respective feed-hoppers of the machine. The valves remain closed until the material accumulates in sufficient quantity to overcome the resistance of the weights, whereupon the valves open automatically and the material is returned from the hopper to the machine without further reduction.

It will be observed that the lower conical end of the chamber G- is inserted into the top of the hopper m, an annular space, 11, being left between them for the admission of air. The chamber is sustained by means of vertical bolts q, attached thereto, and extended downward through the edges of the hopper m, the bolts being provided with nuts, by means of which avertical adjustment of the chamber may be effected in order to change the size of the air-inlet. In practice it is found that the inflowing current of air, which is introduced through the openings 1) by the action of the blast delivered from the pipe I), is material in effecting the proper separation of the coarse material from the fine.

Vhile it is preferred to retain the construction represented, it is manifest that any equivalent construction which will secure the admission of air to the mouth of the pipe I) may be substituted.

At its top the chamber G is connected by a pipe with one end of a large chamber, I, provided with an air-outlet at the opposite end. This chamber is divided at its lower part by vertical partitions into numerous compart ments designed to receive the material of different grades or degrees of fineness. The upper part of the chamber is provided with vertical partitions extending downward between and slightly below the upper walls of the compartment, these depending partitions serving as deflectors to direct the air-current downward and facilitate the deposition of the material held in suspension thereby.

Having thus described our invention, what we claim is- 1. In an ore-reducing machine, the body or casing, of decreasing diameter towardits ends, and the rotary heads having the divergent overhanging arms, combined with means, substantially as described, for adjusting said heads in the line of their axes.

2. In an ore-reducing machine, the combination of the body or casing of the form described, and the two revolving heads, each consisting of a hub provided with spiral laterally-projected arms, and with peripheral surfaces forming continuations of the faces of said arms.

3. The rotary heads having hubs with latorally-extending divergent arms overhanging the central space between them, and with peripheral surfaces forming continuations of said blades across the hubs, in combination with the body or casing, with feed-openings, arranged, as described, to deliver material upon the peripheries of the hubs.

4. The rotary heads, each provided with disconnected overhanging blades, substantially such as described and shown, in combination with the body or casing provided with annular air-inlets at the ends and an air-outlet at the middle.

5. The combination of the body or casing, having the central air-inlets at the ends, and the rotary heads, as described, adjustable in the line of their axes, wherebythe air-admission may be varied as required.

6. In combination with the body and the rotating heads, adapted, as described, to produce an outward blast, the receiving-chamber and deflector, the hopper, and the spouts for returning the coarse material to the machine.

7 In combination with the reducing and blast-producing mechanism, substantially as described, the discharge-tube I), the chamber, the deflector, the hopper having an air-inlet around its top, and the return-spouts from the hopper to the machine.

S. In combination with the reducing and blast-producing mechanism, the dischargespout, the hopper, the receiving-chamber adjustably connected with the hopper, and the deflector.

9. In combination with the reducing and blast-producing mechanism, substantially as described, the discharge-spout, the receivingchamber, the hopper, the automatic dischargevalves, and the conductors for returning the material to the reducing mechanism.

10. In combination with the body and the revolving heads, as described, the dischargespout, the settlingchamber I, connected therewith, and a deflector and hopper located in said discharge-spout between the reduction mechanism and the sett1ing-chamber, as described, whereby the coarse material deliv- 1o ered from the machine is arrested, and the fine material only delivered to the settling-chamber.

GEORGE RAYMOND. ALBERT RAYMOND. Witnesses:

FREDERICK O. GOODWIN, E. F. RUNYAU. 

